Locomotive reversing gearing



J. S. NEWTON LOCOMOTIVE REVERSING GEARING May 10, 1949.

- Fi-led June 28, 1946 WITNESSES:

2 Shets-Sheet 1 INVE NTOR km N S. NE'w-roN BY L Q. agM

ATTORNEY May 10, 1949. J. s. NEWTON LOCOMOTIVE REVERSING GEARING Filed Ju ne 28, 1946 2 Sheets-Shem} 2 N I O WW m T A. s a 4 m a m In F m a \\\\\\\\\\\\%///Z n \m my xv:v\v m 1/! VIII!!! VII/ILWV\\\\\\\\\.

WITNESSES: 1 w. fi/m fii 1 ATTORNEY Patented May 10, 1949 UNITED m 1 v mm m."

th me LOGGMfl-TIW E REVERSING GEA'RING nhn i- "Newt n Lgzg m, he,

Westieehmne E u gh et en;

the inv ntiee relates t9 a unitary thrh ne 4 ree e ti n gem ee e ieell e l ee e t M the i se the iiibiee having a r a -member, end. it ha e e el ieet t9 Pm ee ee eteti s ei this eheifeeter h xine hui j n reversing m an peeing meeh ne reve ent and eheee P nie Wh e axe are eeeh w e-ee I e the axis t a siriven gee? the eeme dieten-e the si -wen eeer e i imm the turbine etery member axis and the ahead pinign being ,qf larger iii; mete han the Pe ewes in en e that it m with the qriveh gear and the e e sin pini n be maint ine 91 ml mesh therewith te gether with mean ie e iftine the mn qn ei eiimierentielly 0f the, ciriv x ear ali n eithe; nee them with the tur ne Wen meme ens; i-e elu eh ne th let er t the an ne pini n A new ebieet e the hv e e ie te. Dre i e PFELKQ- fer ee tutbl when h 91 the ebeve we, t9 wed e fee enti e-tine 9f the b ak that it is appl ed be ete eieeh Y 28 9n b g ns nd i re ased eiter the, l tter i eeinn eted.

A fu ther Qbieet of the invep ien is to pmvielt @nearei us. of th above, charaeter with ebutm nts, whieh en a e in define ali n p siti s of the. einio s with the turbine rotary member, and ,su arran ement of the piniens with res ect tn the driven gearand the turbine rotary member that, far each direction of the gearing, lateral thrust of the latter is effective in exert engaging pressure on engaged abutments.

The fcregeing :and other objects are effected by. the invention as will be apparent frem the feilqwing description and eleimstaken ineonneee tio n-with the accompanying drawings, fo 'm-ing :1 part at this applicatiqn, in which:

Fig. 1 is a side elevational View of a turbinedriven loeoniotive having the improved tig-ansmis sion;

n 2 is e e nel View a t r in ns! re: ii ti n ar a s mbl h i the im v d uiltn.. 1 meet Fi T tee eet e ei View t ken ee he ne Iii-rill" r/fi 2: and.

Fi 4 i siie rei me e ew! Pert n tie if'e q ebqwieef me he ie eventing he brake h and. Shift ng th e hiqns- .i .i ,i ther ehewn. e .teemQtive.v I hevin. e heme R E Z E'EQQ. by vhee e ineluqin striving, wheelie eet iee h ne, l4 fer reshieti e. eeezihg can-- g geetin ihe tiiihine. Hi. t9 the iliiyihgwh ele ;he, whine e nd tim see ng-1 on v1,

theeeer easin to enn titn e a un tary easin etri etueei e iinehi i e dr en ear it; we ehe isi eiiiien L9 eeehie mel a Be versine pini n meehing th eh ee p nien, d iv n ear h n wit! a e 2- moun ed in eeerinse 23.. tirevieee y t e seeing: The in ene 19 iiiitl itieremeunted a. .2 .ioumel edi at the h eei ise 3:

the. i e ihe Bi. en 1!! h pi sma le diam ter .t ,eeiae e wis -that! w th qualey ae i, eieiene eeitem-the. dri e -i ear xis 95. at th wh te tete e member ax s item q geese e th r of the pin QHs met el te mlhwit i turb ne r i r he wi h tter 94" he d pinie mei tei eei in. meeh w t driv eeeer end. the smalle at ie elitism ut Qt mesh the. w hr turbine me ude e ota y d iv m m r it having a m able qri ine eluteh m m e 21 heyesier e lineei iheiet am he reversing and ahea gimme are pr vi ed with r ven lutch els whe e t we 2.?- A t e th rein; ef t e tur tine retest-y driving member axi from hedrivee et/Mme i the-ew at that of th et er irem the re nihg m l ahea p ni n axes, the carrier he meveci s: lien the einiq with th tetbine emery member; and wit ithe in en in alignment; the lu en member 2 is c used. to tenneet wit the eluteh member 25 r the. clutqh set-Bites. the be- W-ith he tue ine ro ating in the m ee= titan een ie tien e it el teh mem er 21 w the clutch nher 2B. reeiilts in eriving h dri en see 1.1: e teveie iiite tien and eenn et e o suc l ttii nemhenwi h the e ute m m 29 re= HHE in dr ving t eteef in the ahead di e ion The c reer? has a t nse f movement im ed. y abutments time 3 peti ion so that with the turbine rotating in the prgpei diregtien, the emitmen e. this; tqrque eeet-i9n v tha is). u tens-x4e teeete e engaging pteesure tc; the eefie esle ment 13 ei- 1e mqved tee ien the, pinione th e t ete hyem suitab e sh ftin mem the, ith e iehment of t e rebe vend it L pihivee th ciriv ng lu en m mb r 15 mate eennee with the pin en d ive uteh me hhen; the timin luten member shqul hemeveqxte t nnes-it w th enei qiseenneet f igm t. e ivenutth m mhet e zero ep eeii a b ake it i nteiereb e e qesi er the, tu bine ary y uitememeee be used t9 apply the mete 31k iiteehneet the an ineliit meme on of supply line 31 and to the drain connection 38,

the valve being provided with an actuating handle 39.

Pistons 4B and 4| are connected, respectively,

to the clutch member 2'! and to the brake 33 for operation thereof, the pistons being arranged in the respective cylinders 42 and 43 to which motive liquid is supplied by the conduits 44 and 45 for clutch engagement and brake application.

Springs 46 and 41 act on pistons 4|} and 4| to release the clutch and brake, respectively, when the motive liquid supply conduits l4 and 45 are interrupted, such conduits preferably having bleeder drain orifices 48 and 49 providing for releas with the desired rapidity.

Preferably, the hydraulic cylinders are controlled so as to obtain the following sequence of operations: Application of the brake, disengagement of the turbine rotor driving clutch member from one of the pinion driven clutch members,

shifting of the carrier to align the other pinion with the turbine rotor, and releasing of the brake. To this end, there is shown an arrangement of valves 58, and 52 for the conduits 45, 44 and 31, respectively, and connected to the shaft 53 having an operating handle 54. Assuming that one of the pinions is clutched to the turbine shaft and that the other pinion is to be clutched thereto, the desired pinion shift is preceded by operation of the valve handle 39 and then, with movement of the handle 54 in the direction of the arrow, the valve 56 is opened to apply the brake, continued movement closes th valve 5| to render the spring effective to release the driving clutch member 21 from whichever of the pinion driven clutch members 28 or 29 it engages, and further movement opens the valve 52 to operate the pistons 34 to shift the pinion carrier, whereupon the handle 54 is moved back to operate the valves in reverse order, the valve 52 closing, followed by opening of the valve 5| to engage the clutch member 21 with the aligned pinion clutch member, and then the valve 59 is closed to render the spring 46 effective to release the brake.

While th invention has been shown in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof.

What is claimed is:

1. In combination, propulsion means, a prime mover including a uni-directional rotary driving member; reversing reduction gearing for connecting the rotary driving member to the propulsion means; said gearing including a driven gear whose axis is parallel to the rotary driving member axis, a carrier pivoted about the driven gear axis, a pair of continuously meshing pinions rotatably mounted on the carrier with their axes maintained continuously fixed in relation to the carrier and equally spaced radially from .the driven gear axis and one of the pinions being larger than the other so that the larger one continuously meshes with the driven gear and the smaller one is continuously out of mesh therewith; said pinions having such diameters that their axes are each spaced from the driven gear axis a radial distance which is the same as that between the rotary driving member and driven gear axes, whereby the carrier may be positioned to align either pinion axially with the rotary driving member; driven clutch members connected to th pinions; a driving clutch member connected to the rotary driving member and movable to connect with and disconnect from the driven clutch member of whichever of the pinions is in alignment with the rotary driving member; means for moving the driving clutch member; and means effective, with the driving clutch member disconnected from the driven clutch members, to shift the carrier to align either pinion with the rotary driving member.

2. Apparatus as claimed in claim 1 with abutments for limiting shifting of the carrier to positions for alignment of the pinions with the rotary driving member and the pinions having such relation to the driven gear and the rotary driving member that, for each direction of drive of the gearing, the driving torque is effective to exert engaging pressure on the engaging abutments.

3. Apparatus as claimed in claim 1 with a brake for the rotary driving member and means for operating the brake so that it is applied precedent to each reversing operation and is released after completion of the latter.

4. In combination, propulsion means; a prime mover including a uni-directional rotary driving member; reversing gearing for connecting said rotary driving member to the propulsion means; a casing structure for the prime mover and the gearing and provided with bearings therefor; said gearing including a driven gear carried by a pair of said bearings arranged so that the gear axis is parallel to the rotary driving member axis, a carrier journalled on the bearings of said pair in coaxial relation with the driven gear axis, a pair of continuously meshing pinions rotatably mounted on the carrier with their axes maintained continuously fixed in relation to the carrier and equally spaced radially from the driven gear axis and one of the pinions being larger than the other so that the larger one continuously meshes with the driven gear and the smaller one is continuously out of mesh therewith; said pinions having such diameters that their axes are each spaced from the driven gear axis a radial distance which is the same as that between the rotary driving member and driven gear axes, whereby the carrier may be positioned with either pinion in axial alignment with the rotary driving member; driven clutch members connected to the pinions; a driving clutch member connected to the rotary driving member and movable for connection with and disconnection from the driven clutch member of Whichever pinion aligns with the rotary driving member; spaced abutments carried by the casing and engageable by abutments on the carrier to define aligning positions of the pinions with the turbine rotary member; the pinions having such relation to th gear and the rotary driving member that, for each direction of drive of the gearing, the driving torque is effective to exert engaging pressure on the engaged abutments; means for shifting the carrier from engagement with one casing abutment to engagement with the other casing abutment and vice versa; a brake for the rotary driving member; and means operative to apply the brake, to disconnect the driving clutch member from the driven clutch member of the aligned 6 pinion, to shift the carrier to align the other UNI pinion with the rotary driving member, to con- TED STATES PATENTS nect the driving clutch member with the driven Number Name Date clutch member of the latter pinion, and to release 965,408 Reno July 26, 1910 the brake in sequence. 5 1,614,203 Ljungstl'om J 27 JOHN s, NE 1,614,204 Ljungstrom Jan. 11, 1927 2,078,128 Doran Apr. 20, 1937 REFERENCES CITED FOREIGN PATENTS The following references are of record in the m Number Country Date file of this patent: 424,993 Germany Feb. 10, 1926 

